Fluorine-free water-based extinguishing agent, preparation method thereof and application thereof in thermal runaway of lithium battery
By utilizing the physical isolation and chemical passivation mechanisms of fluorine-free water-based fire extinguishing agents, the problem of efficient cooling and prevention of reignition in lithium battery thermal runaway is solved, achieving an environmentally friendly fire extinguishing effect suitable for new energy vehicles and energy storage power stations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIERUN TECH (GUANGZHOU) CO LTD
- Filing Date
- 2026-05-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium battery fire extinguishing technologies suffer from weak cooling capacity, insufficient anti-reignition performance, or lack of environmental friendliness. Traditional dry powder and gaseous fire extinguishing agents cannot simultaneously meet the requirements of efficient cooling, deep suppression of reignition, and green environmental protection. Water-based fire extinguishing agents have cooling advantages but low fire extinguishing efficiency and poor anti-reignition ability. Fluorine-containing products are contrary to the trend of fluorine-free environmental protection and are also costly.
Using a fluorine-free water-based fire extinguishing agent, a combination of low-temperature hot-melt polymer powder and cationic natural polymer derivatives is used to cut off the triggering source of thermal runaway reignition through a dual path of physical isolation and chemical passivation. An anti-reignition combination agent is added to react and cross-link at high temperature to construct a micro-dense carbonized isolation layer, blocking oxygen diffusion and thermal feedback.
It achieves efficient heat absorption and cooling, rapid extinguishing of open flames, and suppression of micro-short circuits and thermal runaway re-ignition inside the battery. It is environmentally friendly, non-toxic, and non-corrosive, and is suitable for lithium battery-intensive applications such as new energy vehicles and energy storage power stations.
Smart Images
Figure CN122399306A_ABST